Bhagavad Gita, Chapter 9, Verse 16

I am the Kratu, I the Yajna, I the Svadhâ, I the Aushadham, I the Mantra, I the Ajyam, I the fire, and I the oblation.

Krishna names himself as present inside the ordinary mechanics of ritual itself, not just the goal ritual points toward.

Being the sacrifice, the offering, and even the herb used in it describes something woven into the real, physical details of practice, not floating somewhere above them.